Boiler-tube-cutting device



June' 7, 1927.

F. W, LARC BGILER TUBE GUTTENQ DEV-ICE mg@ my La. leas a @neetysneeg 1 www June 7,1927. l F WLARU 1,631,495

BOILER TUBE CUTTING DEVICE Filed July 15. 1925 :s sheets-sheet 2 aww/nto@ 6 Sheets-Sheet 3 Filed July l5, 192s 31a/vento@ am mug ly to that cl'assrof devicesfor cutting'tli'e Patented June 7, 71927. v

i UNITED' STATES;

" rimini: mino, l or ia'riiiuco", 'ivinxrod Application filed Julvl 1 3, 1925; Serial No.'43,390l

The lpresent invention `ilppertainsgener-l` allyl to cuttingdevices, and more lparticular-4 tubes vout of boilers. l

The principal object of the "inventionis to provide an adjustable cutter, whereby the tube inaybecut a ldistancefromuthe. end

thereofor at the `end desired.

A further Y provide a device of this nature, whichis thereof, `as may be possessed of an exceedingly. simple and eiiicient4 construction, oneV which Lis reliable in operation, inexpensive-to manufacture, strong and durable, not liable'to Yreadily get out'of order, easy to manipulate-and adjust,

and Votherwise well adapted tothe purpose for which itis designed.' y

Another very important objectvo the in vent-ion is to provide a tool of this nature,-v

consisting of a suitable number ofxparts, which are adapted to lbe readily assembled f or disassembled. t

ofthe Wedging pin, i ,v l* i Figure 7 's a detail perspective `lview of :With the above numerous other objects inview, as will appear `as the descrip-- tion proceeds, the invention resides incertain novel `features-of construction, and in the combination and arrangement of parts as 'will be hereinafter more fully describedV Figure 3` is a longitudinal sect-ion there# through. v I

' Figurel is an; end velevation of the mandrel. Figure 5 is a detail sectional View onan enlarged scale, showing.l the Vmeansyfor hold# Y ingrleaf springs used with this embodiment. fr

igure 6 is a detailelevation of one end i one of the springs. 1

Figure 8 is an end elevation of the retain#l ing collar for the knives. Y y

Figures 9' and9a are perspectivevv views `of the cuttingknife.

Figure '10 is an elevation of a spacing ring that shown in. F igeV being a modification of 'ure l.

object of ythe f invention; is? to ll 0f jFigure 10, looking in.y the direction of the. arrows. f Y Y,

Referring Figure l1(1"i'sfa transversesectionf there-E 4 through taken substantially.oli-theline 11e` A v d. i, Figure 12vi's a longitudinal section-theref to `the drawings in detail, and

more particularly Figures: 1 'to 19a. finclusive,a V

dicated at Bprov:ided with the-usualti/ibeTy-,i`

heldagainst longitudinal displacement by`A the end flange F.y Y A'man'drel 5 is provided` wthua 'cylindrical shaped outer surfacefhav-J ing a-plurality of indentures `therein, areV Aranged ina spaced series of cirolesfas is' evident from inspection of)- Figure 1.-.

The linterior of this mandrel 5v isfprovidedg f with a longitudinally'` extending@tapering bore 7, havingextending from its `innerend aV plurality of, longitudinally` 'extending groovesS, which in the present instance, are three in number, but, oit' course,the^nuinber thereof-1 may be varied, vas `clesii'ed.'j.T liese` groovesV 8, are deeper at theirzends than at'` their intermediate portions,1v because ofthe taperedbore '7,' as is .indicated Y to advantage inFigureB, and forincornpartments' tor r"e-i ceiving Aleatsprings 9, thefinnerL 'endsv yof which are fastened by Lv-shaped -bolts 1'( ),th`efl nuts associated ftherewitln-being embedded f v as-indicated at' 11, in the oute'rsurface of the mandrel. lt is notnecessary thatthe entire' bore 7 be tapered, as it may be cylindrical at the outer end thereof, asv is vindicated at 12: Thismandreliis adapted-*to bve-extended into tlhei boilertube `T, andthe distanceat which itis extended within they wtube'is con` trolled: `by lan abutinentring l13, adapted to be exposed about thefinandrel, as shown in Figures -1f and 3. A plurality o'fvset screws or boltsfor the like,V are threaded'radially` through the ring, i'or engagement Vwith in--f Vdentures 6. j By providing these indentres as described, in a plurality of circularly arjranged series', it' will be seenlthat ,thepringl mayl be. moved longitudinally of the mandrel and lockedin engagement at desired points.

byengaging-set screws-'13. in `the `proper indentures. The inner endet the mandrel provided with a pluralityy of radially* eir-- tending recesses .141, arrangedi'n c oincijdfencev withfthe grooves' 8, Afor thegreception4 ofV blades foi-*knives 15,' whiehjareV constructed with curved shoulders lfat tliei'iinner ends-f cutting edgesy 17, at their. outer edges, and

slots or openings 18 adjacent the shoulders l 16. The shoulders y16 are adapted to extend outwardly fromy themandrel Vas indicated in Figure 3, While' the blades, that is, the bodies thereof, are located in the recesses .14, and

the springs 9 extend through the slotslS thereof. These springs 9 are tensioned to hold the knives in a predetermined position,

preferably so that the knives Aare j ust'slightly projected beyond the outer 'surface of the mandrel.

yA retaining collar 20is lprovided With av tapered-bore 21, and bolt holesl 22, Vso that it i may be attached to the inner end 'of' the vmandrel- With thevbore 2l in alignment with bore 7, by means ot bolts 23 passing through the bolt ,holes 22 'and vthreadably engaged with the mandrel. The endjot the collar 20,

adjacent the .inner end of the mandrel is provided With-recesses 24 radiating from the bore 21, in V'coincidence with the recesses 14, for-the reception of the shoulders Y16 of the p knives 15it being noted that recesses'24 are not as Wide as recesses. 14, tor the reason that the Yshoulders l'are iiot formed as wide as the bodies of the'knives. This, however, is clearly a matter of preference, and `may be varied.V An operating Wedge pin is indi` cated kgenerally at 5, and includes a cylindrical body 26, having the tapered extensionA 27 at one end, anda transversely extending ends or shoulders of the blades 15, and,rot course, when driven in,y by a sledgezliammer or the like, Will project thesel blades out- "Wardly trom jthe mandrel into engagement With the inner surface ot the tube T. This process is continued, as will be; readily understood by those skilledr in this art.l

Particular attention is noiv called to Fig ures 10 and 12 inclusive, wherein applicant has shown a. modified form of the adjustable ring, Which may be used With the embodiment of the invention just disclosed, in place of ring 13. This improved adjustable many drel retaining device consists ot a ring 3U, having screws 31 projected radially therethrough for engagement lwith vthe indentures j 6 of the mandrel, and one side tace thereof is recessed, as is indicated at 32, Figure' V12, forthe reception of an linwardly dief.

posedr end flange 33, on the cylindrical body 34. This body 34 is slotted,longitudinally, as at 35, vfor the purpose ot saving material,

and also for the purpose of forniingvsight openings, in order that the major portion ot the mandrel Willbe visible. The fiange 33 is locked in the recess 32, by an annular member 36, held in engagement with the ring 30, by screws or other suitable fasten# ing elements. With thisA retaining ring, it isy possible to solocate the Vmandrel 5,1that the knives may sever .the tlange F 'from the tube T. The .use of this ring 30, in place of ring 13, is quite evident, Without a more detailed description orv further illustration.

It will be*` apparent from the above that VI have produced a device, which may be eiectivelyv usedrinfcutting out tubes oit' a. boiland it is to be understood that numerous`r changes in the details of construction, in tiie materials, and' in the.r combination and arrangement of parts/may kbe resorted to', with-v outdeparting trom the spirit or scope'of the invention ashereinafter claimed, or sacrificin'g any of itsadvantages.

Having thus described 'inyl invention,v

what I claim as new is: f

1. A cutting tool'ot the class described, including a mandrel having a` longitudinally extending bore and on one end providedr with radially Vextending recesses, said bore ofthe mandrel being provided with longitudinally extei'iding` pockets,`V springs supported 4in the pockets, knives klocatedvin the recesses, a` collar having radially extending recesses registeringwith the iirstfinentioned radially extending recesses, said collar being provided with abore registering with the bore of the mandrel, said knivesbeingpro-v vided with shoulders extending` into the sec-v ond mentioned recesses, said springs having theirextremities engaging the knives,land means slidable through the bore for project? ing thel knives. f I I 2.V A cutting tool of the class described, comprising a mandrelfhaving a longitudinally extending bore and on one end being provided Wit'hradially extending recesses,- a

collar having :radially extendingA recesses registering with the first mentioned radially extending iecesses.''iiieans tor securing the collar to the mandrel, said collar being pro`l vided With aibore'iegis'tering with the bore of the mandrel, blades disposed in the firstl mentioned.. recesses, and providedv With shoulders extending .into the second men-A tioned recesses, springs extending longitudinally thro-ughthe boie'koi the mandrel, having one en d xed thereto and the other end Vengaging .the blades, and means extendible through the bore for projecting the blades;

In testimony whereof I aliix my signature.

FRANK W. Lano. 

